Bichabd hollinb mtxbbay



Jan. 31, 1928! v R. H. MURRAY Re 16,863

LIGHT REFLECTING DEVICE 0R UNIT Original Filed April 5. 1926 I F/G/ 7/03 J 1 v entar V I wwwm Reiasuecl I an. 31, 1928.

-- UNITED; STATES Re. 16,863 PATENT OFFICE;

- RICHARD EOLLINS MUBBAY,.OF MANCHESTER, ENGLAND.

LIGHT-BEFLECTING DEVICE OR Original No. 1,625,905, dated April 20, 1927, Serial No. 99,776, filed April 5, 1926, and in Great Britain January 22, 1920. Application for reissue flied September 9, 1927. Serial 1h. 218,561.

The invention has reference to light-reflecting devices or units of the type comprising a lano-convex lens and a concave reflector arranged behind the plane rear sur- 6 face of. the lens. Such devices are commonly used in the construction of road indicators and other signs which at night are illuminated or rendered visible by the reflection of li ht coming from the lamps of motor vehic es or some other extraneous source.

used for-buoys or beacons and other such In many instances such indicators or signs are made up from a plurality of such units or devices arranged in some predetermined order. Devices of this nature may also be similar guides used in navigation, asin such uses they i would indicate a well defined course or clearly indicate a docking place.

The invention has for its object to provide improvements in light-reflecting devices or ing fitted in a frame'or holder and which also serves as a protector to the reflector.

Further, according to the invention, the plane rear surface of the lens is ground and polished, whilst where the base or cap is separate from the reflector, the intervening spacebetween the latter, and said base or cap is or may be fitted with a suitable plastic material adapted to harden after the base or cap has been fitted. I

In the accompanying drawings Fig. 1 is a sectional elevation of one form of reflecting unit in accordance with the invention, and Fig. 2 is a plan of the base or cap thereof. Fi s. 3 and 4 are like views to Fig. 1 of two urther forms of reflecting unit in accordance with the invention, and Fig. 5 is a part sectional'elevation illustratin the assembly of a number of units in a ranie or holder to form a si Referring to the rawing, 7 is a lens having a convex front surface 8 and a. plane rear surface 9 behind which is fitted a concaved reflector 10 secured on the lens by a flange or rim 11.

'In he device illustrated in Figs. 1 and .bears. The cap may be secured in position holder after assembl 2, a cap 12 which ma be pressed out of sheet metal in the form 0 a flat-bottomed cup, is fitted on the rear end of the lens to enclose the reflector 10 and form a base upon which the unit may he stood u right.

The vertical wall or ange 13 of the cap 12 extends beyond the flange or rim 11' of the reflector and has formed in it an annu-- lar shoulder ;14 against which the reflector by crimping its wall or flan e 13 tightly against the periphe of the l ens. Preferably, the cap is part y filled.with a plastic material 15, such as 'putty,'cement, Paris plaster or the like, and the unit is pressed into the cap until the reflector bears against the annular shoulder 14, the displaced plastic material filling the space between the wall or flange 13 of the cap and the lens, i

and the plastic material on subsequent setting or hardening serving to securethe cap in position. Recesses 16 ma be provided in the shoulder 14 to permit t e ready flow of the displaced plastic material from the space below the reflector into the annulus between'the periphery of the reflector and the vertical wall or flange 13 of the cap.

The provision of the cap 12 prevents ac cess of dirt and moisture to the reflecting surface ofthe reflector and damage to the latter by knocks or blows, and also enables the units to be accurately positioned, without the use of external su ort, while being grouped a tray-like holiler 17, Fig. 5, in which th'ey may be secured by a cement or plastic material 15 which is run into the of the units.

In the modified orm of unit shown in Fig. 3 the cap 12 aforesaid is dispensed with and, instead, the rim or flange 11 of the reflector 10 is extended and turned back at 11 to form a base on which the 'unit can rest upright. Thespace below the-reflector and between same and the turned back rimor flange 11 is preferably filled with Paris 100 stand upright.

lane rear surface 9 of piaolished In all cases the the lens is preferab y ground'a'nd as it is found that such consldera of the lens ly "enno hances the reflecting properties of the device and is an improvement over the device asto secure by Letters atent is:

. havlng an annular shoulder intermediate its 1. A light-reflecting device or unit of the kind referred to, comprisin a piano-convex lens, having a cylindrical body, a concave reflecting surface positioned behind the rear surface of the lens and a ca mounted behind said reflectin surface a apted to serve as a protector an a a base for the reflector,

' said cap being in the form of a flat bottom.

cap enclosingv the reflector and having an extending annular wall embracin the periphery of the lens, the ca an reflector hem cemented together wit a plastic ma- .teri inserted between the cap and reflector and adapted to subsequently harden.

2. A light-reflecting device or unit of the kind referred to, comprising a plano-convex' lens having a cylindrical bod a concave reflecting surface positioned be ind the rear surface of the lens and a ca mounted be hind said reflecting surface a apted to serve as a protector and a base for the reflector, said cap being in the form of a flat bottom cap enclosing the reflector and having an extending annular wall embracing the riphery of the lens,- the cap and reflector mg cemented together with a plastic material inserted between the'cap and reflector and adapted to subsequently harden, said wall having an annular shoulderinter'mediate its extremities for engagingsaid lens.

8. A light-reflecting device or unit of the kind referred to, comprising a plane-convex lens having a cylindrical body, a concave reflecting surface positioned behind the rear surface of the lens and a cap mounted behind said reflecting-surface adapted to serve as a' protector and a base for the reflector, said P tending annular wall embracing the periphery of the lens, the ca and reflector being cemented together wit a plastic material insertedbetween the cap and reflector and adapted 'to subsequently 'harden, said wall extremities against which the rear end of the vlens bears, said shoulder having recesses therein adapted to permit insertion of said" being. in the form of a flat bottom cap" enclosing the reflector and having an exenclosing 'the'lens, the metallic cap having a flat bot- I plastic material between said cap and said reflector.

4. A light reflecting device or unit of the kind referred to, comprising a lens formed of a cylindrical body of glass having the outer end convex, a concave reflecting sur-' :tace positioned behind the rear surface of length greater than the radius' of curvature of the convex end, a concave reflector immediately adjacent. the other end with the radius coinciding with the axis of the cylindrical body of the lens. a protective metallic cap hermetically enclosing the reflector and adjacent end of the lens, and a plastic material inserted between thecap and reflector and adapted to subsequently harden.

.6. A sign comprising a flat holder and a, plurality of reflecting units therein each in cluding a lens formed of a cylindrical body of glass having the outer end convex and a concave reflector at the other end and having a protective metallic cap hermetically enclosing the reflector and adjacent end of the lens. the metallic cap having a flat bottom and the units being mounted withfthe. flat bottoms of the caps against, the flat holder.

- 7; A sign comprising a flat holder and a plurality of reflectin units therein each ina'concave reflector at theother end and the reflector and a jacent end of tom andthe units being mounted with the flat bottoms of the caps against the fiat s. RICHARD HQLEJINS URKAY.

eluding a lens forme ofa cylindrical body of glass having the outer end convex and having a protective metallic ca hermetically 

